var currentRequests = {};
$.ajaxPrefilter(function(options,orginalOptions,jqXHR){
	if(options.abortOnRetry){
		if(currentRequests[options.url]){
			jqXHR.abort();
			console.log('abort');
		}else{
			currentRequests[options.url]=jqXHR;
			console.log('ajax加载成功');
		}
	}
});
$(document).ajaxComplete(function(options,originalOptions,jqXHR){
	delete currentRequests[jqXHR.url];
	console.log('无重复加载');
});